Lately, I've seen many artists challenging themselves to remake their artwork they made several years ago. With such challenge, you can see how much you've improved throughout the years, or - even if you didn't change your workflow significantly - you can compare how you build your final work based on the same idea or concept.
I did a couple of things differently - even in the original version, I wanted the temple ruin to be on the top of a rock arch, but I didn't have the skills and the tools to make one. So, this time, I modelled an arch myself (the basic shape was created in VUE with primitives turned into a metablob, and I sculpted the details in ZBrush). I also used way more complex materials and ecosystems; instead of a single layer of procedural rock material (plus a pretty uniform ecosystem), the new arch and mid-ground mountains have ~8 layers of hybrid materials, including seamless bitmaps and fractal-based procedural materials as well.